struts超简单入门（三） 写三个java类，编译后放到Tomcat 5.0webappsstrutsWEB-INFclassescomjaver eststruts目录下 【HelloFrom.java】： package com.javer.test.struts; import javax.servlet.http.HttpServletRequest; import org.apache.struts.action.ActionError; import org.apache.struts.action.ActionErrors; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionMapping; public final class HelloFrom extends ActionForm { private String person = null; public String getPerson() { return person; } public void setPerson(String person) { this.person = person; } public void reset(ActionMapping mapping, HttpServletRequest request) { this.person = null; } public ActionErrors validate(ActionMapping mapping,HttpServletRequest request) { ActionErrors errors = new ActionErrors(); if(this.person==null || this.person.length()

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